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You searched for: subject:"phonons"
[texts]Thermodynamic pressure in superfluid helium and its implications for the phonon dispersion curve - Menard, Albert Robert, 1943-
Typescript
Keywords: Liquid helium; Phonons; Superfluidity
Downloads: 158
[texts]Ramon and phonon masers - Chiao, R. Y.
Raman effect and phonon masers
Keywords: MASERS; PHONONS; RAMAN SPECTRA; MASER; RAMAN EFFECT
Downloads: 68
[texts]Analysis of Phonon Heat Conductivity of Semiconductors
The various inadequacies of Callaway's phenomenological model of lattice thermal conductivity has been critically analyzed and the model is repaired in a modified form in which the systematic replacement of life time by line widths amicably resolves the various issues. The involvement of various scattering events in the heat transport, e.g., boundary scattering, impurity scattering, anharmonic phonon scattering, resonance scattering and interference scattering has been addressed in the n...
Keywords: Lattice Thermal Conductivity; Phonons; Various Scattering
Downloads: 14
[texts]Defect Electronics in Semiconductors - Herbert F. Matare
Herbert F. Matare Defect Electronics in Semiconductors John Wilet & Sons Inc. 1971 Acrobat 7 Pdf 66.5 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Electronics; Physics; Charge Carrier Transport; Dislocations; Phonons
Downloads: 676
[texts]Tunneling measurements of superconducting quasi-particle density of states and calculation of phonon spectra (Volume 74A) - Rowell, J.M.
Journal of Research of the National Bureau of Standards
Keywords: Density of states; phonons; semiconductors; superconductivity; tunneling
Downloads: 73
[texts]Operation of descent module of the Mars-6 automatic interplanetary station in the Martian atmosphere - Sokolov, S. S.
The descent module of the Mars 6 automatic interplanetary station is discussed as it entered Martian atmosphere at the velocity 5600 m/sec. After aerodynamic braking on attainment of approximately 600 m/sec, the parachute system was activated. The descent module of the Mars 6 reached the Martian surface in a region with nominal coordinates 23.9 deg S. lat. and 19.5 deg W. long. The descent period, from atmospheric entry and aerodynamic braking to parachute-assisted descent, took 5.2 min.
Keywords: CHARGE CARRIERS; COUPLING; LASERS; ULTRASONIC RADIATION; ACOUSTIC MEASUREMENT; PHONONS; RESONATORS
Downloads: 135
[texts]Low Temperature Physics LT 13 Volume 3 - K.D. Timmerhaus, W.J. O'Sullivan & E.F. Hammel
K.D. Timmerhaus, W.J. O'Sullivan & E.F. Hammel Low Temperature Physics LT 13 Volume 3 ( Superconductivity ) Plenum Press 1974 Acrobat 7 Pdf 36.4 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Type II Superconductors; Dynamics; Josephson Effect; Tunneling; Materials; Phonons
Downloads: 538
[texts]Properties of Minor Ions in the Solar Wind and Implications for the Background Solar Wind Plasma - Esser, Rut
Ion charge states measured in situ in interplanetary space carry information on the properties of the solar wind plasma in the inner corona where these ion charge states are formed. The goal of the proposed research was to determine solar wind models and coronal observations that are necessary tools for the interpretation of the ion charge state observations made in situ in the solar wind.
Keywords: MAGNETORESISTIVITY; SOLID STATE; SWITCHES; TUNGSTEN; ADIABATIC DEMAGNETIZATION COOLING; PHONONS; CRYSTAL STRUCTURE; THERMAL CONDUCTIVITY; CONDUCTIVE HEAT TRANSFER
Downloads: 78
[texts]Evaluation of Waveform Mapping as a Signal Processing Tool for Quantitative Ultrasonic NDE - Johnston, Patrick H.
The mapping of one pulsed waveform into another, more desirable waveform by the application of a time-domain filter has been employed in a number of NDE situations. The primary goal of these applications has been to improve the range resolution of an ultrasonic signal for detection of echoes arising from particular interfaces masked by the response of the transducer. The work presented here addresses the use of this technique for resolution enhancement in imaging situations and in mapping signal...
Keywords: ELECTRON MOBILITY; DEOXYRIBONUCLEIC ACID; S MATRIX THEORY; LASER BEAMS; ENERGY TRANSFER; ELECTRONS; PHONONS; MIGRATION; MATRICES (MATHEMATICS)
Downloads: 89
[texts]Evaluation of reformulated thermal control coatings in a simulated space environment. Part 1: YB-71 - Cerbus, Clifford A.
The Air Force Space and Missile Systems Center and Wright Laboratory Materials Directorate (WL/ML) have sponsored and effort to effort to reformulate and qualify Illinois Institute of Technology Research Institute (IITRI) spacecraft thermal control coatings. S13G/LO-1, Z93, and YB-71 coatings were reformulated because the potassium silicate binder, Sylvania PS-7, used in the coatings is no longer manufactured...
Keywords: PHONONS; POLARITONS; POPULATIONS; QUANTUM OPTICS; SOLIDS; SQUEEZED STATES (QUANTUM THEORY); CRYSTAL OPTICS; DENSITY DISTRIBUTION
Downloads: 119
[texts]Specular reflection of phonons in superfluid helium at 0.33 deg. k - Fajans, J.
Specular reflection of phonons in superfluid helium
Keywords: HELIUM ISOTOPES; SPECULAR REFLECTION; LIQUID HELIUM; LIQUID HELIUM 2; PHONONS; REFRIGERATING; SPECULAR REFLECTION; SUPERFLUIDITY; HELIUM; PHONON
Downloads: 58
[texts]AUTOMATION OF THE COLLECTION AND ANALYSIS OF SCIENTIFIC INFORMATION IN THE PROBLEM OF THE INTERACTION OF THE ATMOSPHERE AND OCEAN - NON
MATERIAL FROM RESEARCH INTO THE INTERACTION OF THE ATMOSPHERE AND THE OCEAN, INCLUDING BOTH EXPERIMENTAL RESEARCH CONDUCTED ABOARD SCIENTIFIC RESEARCH VESSELS, AND WORK OF A THEORETICAL NATURE IS PRESENTED. A NUMBER OF ARTICLES ARE DEVOTED TO THE PRINCIPLES BASIC FOR A SHIP AUTOMATED SYSTEM THAT COLLECTS AND ANALYZES OCEANOLOGICAL DATA. THE THEORETICAL ARTICLES DEAL WITH THE BASIC CONCEPTS OF HYDRODYNAMIC MODELS OF ATMOSPHERIC AND OCEANIC CIRCULATION.
Keywords: ASTRONOMICAL SPECTROSCOPY; PHOTONS; PYROELECTRICITY; THERMAL NOISE; BOLOMETERS; HELIUM ISOTOPES; INFRARED SPECTROSCOPY; SEMICONDUCTOR DEVICES; CRYOSTATS; FLICKER; JOSEPHSON JUNCTIONS; PHONONS
Downloads: 128
[texts]Heliocentric abort delta 5 requirements for 1977 - 1986 Mars conjunction-class missions - Mcneely, J. T.
No Abstract Available
Keywords: HELIUM; SUPERCONDUCTORS (MATERIALS); INTERSTITIALS; METALLIC HYDROGEN; PHONONS; QUANTUM THEORY; VACANCIES (CRYSTAL DEFECTS); CRYSTALLOGRAPHY; ENERGY STORAGE; SOLID STATE
Downloads: 59
[texts]Transport System for Delivery Tourists At Altitude 140 km - Bolonkin, Alexande
The author offers a new method and installation for flight in space. This method uses the centrifugal force of a rotating circular cable that provides a means for the launch of a payload into outer space, to keep the fixed space stations at high altitudes (up to 200 km). The method may also be useful for landing to space bodies, for launching of the space ships (crafts), and for moving and accelerating other artificial apparatuses...
Keywords: SEMICONDUCTOR LASERS; PHONONS; ELECTRONS; HOLES (ELECTRON DEFICIENCIES); HARTREE APPROXIMATION; SCATTERING; DIODES; OPTOELECTRONIC DEVICES; DIFFUSION; PLASMAS (PHYSICS); BOLTZMANN TRANSPORT EQUATION; DISTRIBUTION FUNCTIONS; MAXWELL EQUATION; OPTICAL POLARIZATION; PARTIAL DIFFERENTIAL EQUATIONS
Downloads: 58
[texts]Theoretical and experimental aspects of the electrohydrodynamics of superfluid helium and focussing of phonons in superfluid helium below 0.5 deg kelvin final report - Fajans, J.
Electrodynamics of helium superfluid flow and electric field investigation of liquid and solid helium structures
Keywords: ELECTRIC FIELDS; SOLIDIFIED GASES; SUPERFLUIDITY; ELECTRIC FIELD; ELECTRODYNAMICS; HELIUM; SUPERFLUID FLOW; ELECTRODYNAMICS; ELECTROHYDRODYNAMICS; FLOW DISTRIBUTION; HELIUM; LIQUID HELIUM; LIQUID HELIUM 2; PHONONS; SOLID CRYOGENS
Downloads: 148
[texts]Clean assembly and integration techniques for the Hubble Space Telescope High Fidelity Mechanical Simulator - Hughes, David W.
A mechanical simulator of the Hubble Space Telescope (HST) Aft Shroud was built to perform verification testing of the Servicing Mission Scientific Instruments (SI's) and to provide a facility for astronaut training. All assembly, integration, and test activities occurred under the guidance of a contamination control plan, and all work was reviewed by a contamination engineer prior to implementation...
Keywords: DIFFERENCE EQUATIONS; VIBRATION MODE; POISSON DENSITY FUNCTIONS; STATISTICAL DISTRIBUTIONS; TEMPORAL DISTRIBUTION; VACUUM; DIFFERENTIAL EQUATIONS; EIGENVALUES; EIGENVECTORS; OSCILLATORS; PHONONS; QUANTUM STATISTICS; RAMAN SPECTRA; SQUEEZED STATES (QUANTUM THEORY)
Downloads: 127
[texts]An overview of engineering concepts and current design algorithms for probabilistic structural analysis - Duffy, S. F.
The article begins by examining the fundamentals of traditional deterministic design philosophy. The initial section outlines the concepts of failure criteria and limit state functions two traditional notions that are embedded in deterministic design philosophy. This is followed by a discussion regarding safety factors (a possible limit state function) and the common utilization of statistical concepts in deterministic engineering design approaches...
Keywords: ATOMIC STRUCTURE; ADDITIVES; ELECTRON PHONON INTERACTIONS; OXYGENATION; PHONONS; SCALARS; STRONTIUM; CALCIUM OXIDES; COPPER OXIDES; DENSITY (NUMBER/VOLUME); ELECTRIC CHARGE; LATTICE PARAMETERS; MOLECULAR DYNAMICS; MOLECULAR STRUCTURE; SUPERCONDUCTORS (MATERIALS)
Downloads: 90
[texts]BSTJ 30: 4. October 1951: Hot Electrons in Germanium and Ohm's Law. (Shockley, W.)
Bell System Technical Journal, 30: 4. October 1951 pp 990-1034. Hot Electrons in Germanium and Ohm's Law. (Shockley, W.)
Keywords: energy; electron; electrons; optical; phonon; modes; germanium; velocity; phonons; drift; free path; average energy; drift velocity; bell system; optical modes; energy loss; room temperature; hot electrons; system technical; critical field
Downloads: 66
[texts]Low Temperature Physics - A. S. Borovik-Romanov (Ed.)
The authors of this collection are leading members of the staff at the Institute of Physics Problems of the Academy of Sciences of the USSR, Moscow. Three of them are Members of the Academy of Sciences. The Institute was founded fifty years ago by the great contemporary physicist P. L. Kapitza. Academician L. D. Landau another giant of our time, also worked at the institute. The institute is world famous for research in low temperature physics...
Keywords: condensed matter physics; crystallization waves; electrons; FMR; kaptiza resistance; liquid helium; low temperature; magnetism; magnetoresistance; magnons; NMR; phonons; quantum crystals; quantum liquids; quantum mechanics; solid helium; solid state physics; cryogenics
Downloads: 503
[audio]2.57 Nano-to-Macro Transport Processes Fall 2004 - MIT OCW
This course provides parallel treatments of photons, electrons, phonons, and molecules as energy carriers, aiming at fundamental understanding and descriptive tools for energy and heat transport processes from nanoscale continuously to macroscale. Topics include the energy levels, the statistical behavior and internal energy, energy transport in the forms of waves and particles, scattering and heat generation processes, Boltzmann equation and derivation of classical laws, deviation from classica...
Keywords: nanotechnology; nanoscale; transport phenomena; photons; electrons; phonons; energy carriers; energy transport; heat transport; energy levels; statistical behavior; internal energy; waves and particles; scattering; heat generation; Boltzmann equation; classical laws; microtechnology; crystal; lattice; quantum oscillator; laudaurer; nanotube; Louiville equation; X-ray; blackbody; quantum well; Fourier; Newton; Ohm; thermoelectric effect; Brownian motion; surface tension; van der Waals potential
Downloads: 6,551
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